” In fact, you will find that the more a couple meets before marriage (on a community comparative basis), the higher the divorce rate. (You’ll also find that the younger couples marry in a community, the better their marriage retention rates are.)”
You have absolutely no proof that the reason why they have better marriage retention rates is because they marry young/have arranged marriages. It is merely a correlation (assuming that the “facts” you stated are even true to begin with)
You need to take sociological factors, like the ones lesschumras mentioned, and others in to account in order to explain the alleged discrepancy in marriage retention.